package com.wyw.hemerocallis.filter;

import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * Http请求头Token验证过滤器
 *
 * @author Mr Wu    yewen.wu.china@gmail.com
 * <p>
 * Update History:
 * Author        Time            Content
 */
public class HeaderTokerGatewayFilter implements GatewayFilter, Ordered {


    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //从Http Header 中寻找key为token，value 为wyw的键值对
        String name = exchange.getRequest().getHeaders().getFirst("token");
        if("wyw".equals(name)){
            return chain.filter(exchange);
        }

        //标记此次请求没有权限，并结束这次请求
        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        return exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
        return HIGHEST_PRECEDENCE + 3;
    }
}
